[Bug]: File deleted when moved into an overfilled S3 bucket

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

When a document is moved to an S3 bucket which is at its quota, the file simply disappears into the void with no error message displayed to the user. There is an error displayed in the log file, however. This issue does not affect larger files, e.g. 128 MB. Maybe it has to do with the chunking mechanism for larger files or something.

Steps to reproduce

1. Have an S3 bucket which is already filled to its quota.
2. Move a small document there (a few kilobytes in size maybe)
3. It should disappear without an error

Expected behavior

The document / file should remain present, and an error message should be shown to the user just as it is with larger files.

Installation method

None

Nextcloud Server version

28

Operating system

None

PHP engine version

None

Web server

None

Database engine version

None

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response

Start by reproducing the move with a small document in an S3 bucket at quota, then compare it with the reported 128 MB case and inspect the server log error. Done means the small file remains present and the user sees an error, matching the behavior expected for larger files.